Bar spacer



0.1. O'BRIEN.

BAR SPACER.

APPLICATxoN FILED JuNE 3. 1920.

Patented Aug. 29, 1922.

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Specification of Letters Patent.

Patented Au?. 29,1922.

,Application filed ,Tune ,3, 1920. lSerial No. 386,211.

To @ZZ whom t moy/.concern Beit known that LCI-inermi J. UBniniv, a citizen of the United States, residingat Chicago, in the county of Cook and State of illinois, have invented certain newv and useful Improvements in a Bar Spacer, of which the following is a specification.

.This invention relates to concrete reinforcing construction, `and .more `particularly to the means for spacing apart and supporting the bars and rods usually steel` which are .used -for ,reinforcing concrete worl` in building construction. The .principal object of the invention is to provide a new and iniproved construction of ,this ,kind rwhich lhas great stability in use. y@ther objects are to make the device morey easily adjustable; to provide longer locking arms; to provide greater strength with the lminimum amount of material, tor simplify lthe construction of the individual pieces, and toallow one ofthe parts ,to be galvanized and to provide acon-v struction in which the parts can .be closely nested for packing or shipping, and for greater facility Yin handling them. The invention consists in the novel construction, combination and arrangement ofthe several parts. i' y Inithe accompanying drawing, `Fig. l is a perspective of a spacer constructed yin accord-y ance with ythe principles of this invention; Fig. 2 is a perspectiveofvone of the supports; and Fig. 3 is a section of one ofthe sup ports in position, i

yThere are a `numberof bar spacers in use at ythe present'tiine, but they arefsubject to many objections whichthe present invention is designed and intended toovercoine. Most of them are liable to spread andare incapable of variable spacing. Anotl'ier objec- 'tion frequently niet withvis thatr the spacer parts are bendable so that they will flatten out under the weight of the bars letting the latter rest lupon the concrete forms ,between the spacers. This will expose the reinforcing bars at the surface ,of the concrete, `or will allowV the reinforcing bar to approach the concrete forni so closely that notenougli concrete will YHow undernthe (reinforcing bar to insure fireprooiing of 5the steel. ln Athe present invention this is overcoineby placing the spacer stripupright kon itsedge so ythat it cannot be flattened out and by securely supporting it in ,place above the foi-ni so that theconcrete will not be divided vby it,

but will flow freely undervit and raround the supports.

Referring now ymore particularly to the tervals jas frequent as desired.` A,.plurality of supports 7 are vprovided which are separately formed of vsheet material, preferably lil-.shaped `in ,cross section, `and adapted to be spaced apart on opposite ysides'jof. the strip 5, supportingthe bar and .securely but detachably attached thereto. Each support is formed at thelower .side of;eachgleg` of the U .with y,the foot 8, which extendsunder the strip 5 actually supportingit and holding the lower t.edge .thereof upwardly away from the form in which the bar spacer is used. The width l,of the `stripw Ais `preferably the 4saine .as the remaining distance. ,from the top yof vthe foot `8 Ito the .upper sides` of the le-,shaped support, so 'that tlieupper edge of :the bar ,5 is flush with ,the `top ofthe support. Projecting .kr-from; the ends yof ythe U -shaped nieinber are bendable ears 9 which are adapted yto be inserted through the aperturesl lof the spacing 4barand then lient over, asclearly shown in v'Fig'. to Ibind the support firmly againstthe bali' yandfrestupon Ithe 4feet 8thereof.

tending upwardly from ythe opposite 4rportion of each support are arms l() which are bendable in Lopposite direction over any kind ,of a (reinforcing har, disposed .between them. These arms are of sufficient length to .engage and secure a bar lof any shape or size which is supported'. by the spacci', and the arms vare `simply bentover the reinforcing bar in ,opposite directions thereby holding `lthe bar in place.

It is obvious `that .this construction isca`- pable 1of great ,variation and adjustment for the supports Amay ebe spaced lat yregular intervals along the bar 5, or the intervals may he yVaried for each one; By disposingof the supports alternately 'onvopposite sides of the bar 5, greatstability is produce'dgand thereis little tendency for the lbar 5 Ato be come ,bent or displaced in anyway, and in facti,.as the supports directly uphold the ,ren

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inforcing bars, very little strain of any kind is imparted to the spacing bar 5, so that the chief function of the latter is rather as a spacer than as a support for the reinforcing bars.

It will also be observed that the spacing bar 5 does not engage the concrete form in which it is placed, but is spaced above it by the legs 8 so that the concrete can run freely under the bar 5, and in fact, only the lower edges of the supports 7 will show at the surface. These lower edges may be galvanized or otherwise treated so that they will not rust. lf desirable, they may be made of non-corrosive metal, but usually galvanized edges are suflicient.

This construction is also readily adaptable for shipping or packing either in completely assembled form, as indicated in Fig, l, or by casing the supports separately by bending the legs of the U-shaped members slightly outward, or by packing them fiat before they are bent. f

I claim:

l. In a concrete reinforcing bar spacer, an upright strip with spaced perforations therein, and means engaging the perforations disposed alternately and entirely on opposite sides of the strip and resting on edge for supporting it in anv upright position with the lower edge of the strip at a distance above the bottom of the concrete form.

2. A bar spacer for concrete forms comprising an upright strip with spaced perforations therethrough, and separate means engaging the perforations extending entirely from opposite sides of the strip and resting on edge for supporting it in an upright position with the lower edge of the strip at a distance above the concrete form.

3. A concrete reinforcing bar spacer comrisino' a stri) and means for suoaortino b 7 D the strip in an upright position upon one edge, said means comprising a detachable rectangular support resting on its rectangular edges and extending entirely from one side of the strip with a base extending below the lower edge and supporting the strip.

4. The combination of a strip having spaced apertures therein, and means for supporting the strip in upright position uponone edge, said means comprising a lateral extending support with ears insert- `able through the apertures and bent over on the opposite side, the support being disposed entirely at one side of the strip and having a base which extends below the edge of the strip and raises it from the form.

5. A bar spacer of the class described comprising a strip with spaced perforations longitudinally thereof, a plurality of supports extending on alternate sides thereof, each support having feet upon which the lower edge of the strip rests, and having means engageable with the perforations for holding the strip in an upright position upon the feet.

6. ln a reinforcing bar spacer, a strip with a series of perforations, a plurality of supports U-shaped in cross section each disposed entirely at one side of the strip for holding it on edge in upright position each support having upwardly extending bendable arms at opposite cornersfoldable over the bar to be spaced, and ears which areinsertable through the perforations to attach the support to the strip entirely at one side thereof.

i'. In a bar spacer, a rectangular metal strip with a plurality of perforations spaced longitudinally thereof, in combination with' a plurality of supports adapted to hold the strip in an upright position and having projecting feet upon which the lower edge of the strip rests, means in connection with each support for attaching it laterally to the strip at regular and irregular distances and on opposite sides thereof.

8. A reinforcing bar spacer' comprising a rectangular strip with spaced perforations therein, a plurality of supports each substantially .ll-shaped in cross section, and having bendable ears at the extremities insertable through the perforations of the strip so that the support will extend at one side of the strip therefrom, and means in connection with the support for engaging and holding the reinforcing bar in position on top of the support.

9. ln a reinforcing bar spacer of the class described, the combination with a rectangular spacing strip having perforations at intervals throughout its length, in combination with means for supporting the strip at a distance above a concrete form in which it is to be spaced and in an upright position, the said means comprising a plurality of supports each substantially U-shaped in cross section, with feet adapted to extend below the lower edge of the strip, and with bendable ears insertable through the perforations of the strip to hold the strip against the free ends of the U-shaped member and upon the feet thereof in upright position, the upper edge of the strip being substantially flush with the upper edge of the U-shapcd member, and arms extending upwardly from angularly opposite corners" of the Ll-shaped member and bendable inwardly over a reinforcing bar placed upon the support between them.

10. In a bar spacer, a metal strip with spaced openings disposed uprightly on edge, in combination with a plurality of detachable supports each having cars engageable in the openings to hold each support extended entirely at one side of the strip and the supports having upwardly extending arms at their opposite corners bendable inwardly over a reinforcing bar placed upon the support between them.

1l. A concrete reinforcing bar spacer, comprising a strip disposed on edge with perforations spaced longitudinally thereof, a plurality of supports extending on alternate sides thereof, and means in connection with each support engageable with the perforations for holding the strip in an upright position.

12. A bar spacer of the class described, comprising a strip with perforations spaced longitudinally thereof, and a plurality of supports disposed alternately along the strip with each support entirely at one side of the strip, and means in connection with each support engageable with the perforations for holding the strip in an upright position, and withy arms extending upwardly from the support bending over a reinforcing bar placed upon -the support between them.

13. A bar spacer of the yclass described, comprsing aystrip withfperforations spaced longitudinally thereof, and a plurality `of U-shaped supports placed alternately along the strip, each support having bendable ears at the extremities of the Ushaped portiony the strip entirely at one side thereof, and4 having arms formed integrally with the upper side of each support which are adapted to be bent over a reinforcingv bar carried by the strip and the support.

CHESTER J. OBRIEN. 

